Seals in Massachusetts in August
Yes, August is one of the best months to see seals in Massachusetts. It is the 1st busiest month of the year, with 494 of the 3,245 sightings logged across the year (15.2%), based on verified iNaturalist records.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Peak month for seals in Massachusetts
15.2%
of yearly sightings
494
records in August
#1
busiest month of 12
3,245
verified records a year
July 12.5%, August 15.2%, September 8.2%. Busiest month is August at 15.2%.
3,245 verified observations of seals in Massachusetts, recorded across 12 months of the year on iNaturalist.
When seals are recorded in Massachusetts
Peak month
August
494 records (15.2% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 195 | 6% |
| February | 164 | 5.1% |
| March | 204 | 6.3% |
| April | 186 | 5.7% |
| May | 207 | 6.4% |
| Junepeak | 396 | 12.2% |
| Julypeak | 405 | 12.5% |
| Augustpeak | 494 | 15.2% |
| September | 265 | 8.2% |
| October | 235 | 7.2% |
| November | 273 | 8.4% |
| December | 221 | 6.8% |
Seals you are most likely to see
| Species | Verified observations |
|---|---|
| Grey Seal | 2,068 |
| Harbor Seal | 943 |
| Harp Seal | 57 |
| Hooded Seal | 1 |
In Massachusetts, August carries 15.2% of the year's seals sightings, about 6.9 points above an even month-to-month split. That makes it the 1st busiest of the twelve months, out of 12 months with recorded activity.
Activity is rising from July (12.5%) into August, and it heads toward September (8.2%) after. This is right inside the peak window, so August is one of the surest months to plan a trip around.
The seals most often recorded in Massachusetts are Grey Seal, Harbor Seal and Harp Seal. Those counts are annual totals rather than a August split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in August itself.
Which seals you are most likely to see
- Grey Seal2,068 records
- Harbor Seal943 records
- Harp Seal57 records
- Hooded Seal1 records
Plan your seal trip in Massachusetts
Start with live tours near Appalachian National Scenic Trail, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Appalachian National Scenic Trail
Use the live GetYourGuide widget to compare local departures and activity styles close to the main seal viewing area.
Booking.com
Stay nearbyStay near Appalachian National Scenic Trail
Compare hotels, cabins and lodges close to the best seal viewing area in Massachusetts.
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Broader backupBook a seal tour in Massachusetts
Compare guided wildlife tours, boat trips and nature experiences if you want a second travel network beyond the live widget.
Frequently asked questions
Can you see seals in Massachusetts in August?+
Yes. August accounts for 494 of the 3,245 verified seals sightings logged in Massachusetts across the year, which is 15.2% of the annual total.
Is August a good time to see seals in Massachusetts?+
August is one of the best months. It ranks 1st of the year and sits inside the peak window of August, July and June.
What month is best for seals in Massachusetts?+
August is the single busiest month, with the broader peak running through August, July and June, based on 3,245 verified observations.
Which seals are you most likely to see in Massachusetts?+
The most-recorded species in Massachusetts are Grey Seal, Harbor Seal and Harp Seal, based on all-time iNaturalist counts.
See seals in Massachusetts in other months
More wildlife in Massachusetts